Device for tube transfer in tube-rolling mill

ABSTRACT

A device for tube transfer in a tube-rolling mill from the roller table to a continuously transporting mechanism, in which the working member is essentially a drum having longitudinal grooves for tubes and provided with guides which, due to the fact that their position can be controlled with respect to the height, make it possible to control the height form which tubes fall from the drum down onto the transporting mechanism.

United States Patent lnventors Appl. No. Filed Patented PriorityVladimir Vasilievich Barakov ulitsa Stalevarov, 8-a, kv. l1,Elektrostal; Alexandr Alexandrovich Sukhanov, prospekt Lenina, l0-a, kv.67, Elektrostal; Anatoly Sergeevich Tyrtov, Noginsky raion, de revnyaBabeeva, 14, Moskovskaya oblast, all of U.S.S.R.

Jan. 16, 1970 Oct. 5, 1971 Apr. 7, 1969 U.S.S.R.

DEVICE FOR TUBE TRANSFER IN TUBE- ROLLING MILL 1 Claim, 3 Drawing Figs.

U.S.Cl 214/1 P, 193/21 1 Int. Cl B65g 29/00 [50] Field of Search198/209, 211;214/1 P, 1

[56] References Cited UNlTED STATES PATENTS 2,856,895 10/1958 Andersonet al 214/1 P2 X Primary ExaminerGerald M. Forlenza AssistantExaminer-Frank E. Werner Attorney waters, Roditi, Schwartz & NissenABSTRACT: A device for tube transfer in a tube-rolling mill from theroller table to a continuously transporting mechanism, in which theworking member is essentially a drum having longitudinal grooves fortubes and provided with guides which, due to the fact that theirposition can be controlled with respect to the height, make it possibleto control the height form which tubes fall from the drum down onto thetransporting mechanism.

DEVICE FOR TUBE TRANSFER IN TUBE-ROLLING MILL The present inventionrelates to devices used for the transfer of tubes in tube-rolling millsfrom the roller tables to a continuous transporting mechanism which is,as a rule, of a screw type. I

Known in the art are devices for tube transfer in tube-rolling mills,comprising a drum having longitudinal grooves for tubes and guidessuspended to an. upright and disposed adjacent to the cylindricalsurface of the drum at the side of the transporting mechanism. Thesedrums are used to provide for the removal of tubes from the drum in acertain order (cf. the device according to the U.S.S.R. Inventor'sCertificate No; ll6,45l;Cl.7a,2602).

The main disadvantage of these devices lies in that the guides of thedrum are made so that it is impossible to control their position withrespect to their height.

Since the position of the guides of the drum is preset so as to letthrough tubes of the greatest diameter, the smaller is the diameter of atube, the greater is the height from which it falls down. As thethickness of the walls of the tubes, having a small diameter, is smalland the tubes are considerably curved along their length, they aredeformed and their surface is damaged when falling down from a greatheight this being particularly true about hot tubes. Besides, whenfalling down from a great height, tubes which are considerably curvedalong their length, get into different turns of the screw of thetransporting mechanism and, therefore, are entangled, which hampers theautomation of the subsequent operations.

Also known in the art are drum-type devices used in rolling mills totransfer profiled rolled stock, wherein the drum is provided withinclined guides transferring the rolled stock directly from the drum tothe transporting mechanism (cf. FRG Pat. No. 1081403, cl. 7a, 20,2).

Such devices can hardly be used in tube-rolling mills, as, when rollingdown along inclined guides, they can form piles on the transportingmechanism due to excessive acceleration.

In case they are greatly curved, the tubes slide down in such a way thatone end of the tube has already slid down, whereas the other one stillstays in the zone of operation of the drum teeth and is gripped thereby.This may cause tube breaking, twisting of the drum shaft, etc.

It is an object of the present invention to eliminate theabove-mentioned disadvantages of the known devices used for tubetransfer.

The present invention has as its task the provision of such a device fortube transfer from the roller table to the transporting mechanism, whichwould ensure to place every tube in a certain order along its wholelength owing to improvements made in the guides.

This object is accomplished by that in the device for tube transfer,which is essentially a drum with longitudinal grooves for tubes,provided with guides disposed adjacent the cylindrical surface of thedrum and serving to provide for the removal of tubes 011' the drum in acertain order, according to the invention, said guides are equipped withslidable arc-shaped shields embracing the portion of the drumcylindrical surface disposed below the axis of its rotation.

The following detailed description of an exemplary embodiment of thepresent invention is given with reference to the accompanying drawings,in which:

FIG. 1 is a side view of the device for tube transfer built inaccordance with the present invention;

FIG. 2 is an enlarged view of the same device, a section being takenalong line IIII of FIG. 1;

FIG. 3 is an enlarged view of assembly III of the device shown in FIG.2.

The device for tube transfer comprises a frame I mounting amultisectional drum 2 (FIGS. 1, 2) which has teeth 3 (FIGS. 2, 3)forming longitudinal grooves 4 for tubes 5 onthe cylindrical surface ofthe drum 1. Suspended to the frame I as the side of a continuoustransporting mechanism 6 are guides 7 having slidable arc-shaped shields8 which embrace a portion of the cylindrical surface of the drum 2disposed below the axis of its rotation.

The shields 8 are provided with slots 9 (FIGS. 3) owing to which factthey may be extended to various levels. The shield is fixed in itspositions by means of bolts 10 passing through the slots 9 and furtherinto holes made in the guides 7.

Prior to operation the position of the shield 8 is adjusted with respectto its height so as to minimize the height from which tubes of one andthe same diameter are to fall down.

For this purpose the distance along the height between lower portion ofthe shield 8 and the inner diameter of the screw should not practicallyexceed the diameter of the tube, provided the shield does not touch thescrew crest.

From the roller table 11 (FIG. 1) tubes are continuously one afteranother delivered into the grooves 4 of the rotatory drum 2 mountedbelow the roller table II, and are braked by friction forces until theyare completely stopped. The rate of rotation of the drum 2 is controlledso that during the period of time required for a new tube to bedelivered to the drum, the latter turns through an angle correspondingto one groove of the drum.

Due to this fact the tubes 5 moving one after another along the rollertable 11 get into different grooves 4. In the course of rotation of thedrum 2 and the tubes are prevented from premature falling out from thegrooves 4 by the guides 7 having the shields 8.

After the tube 5 disposed in the groove 4 of the drum 4 has left thezone of action of the shield 8, it falls into a turn of the screw of thetransporting mechanism 6 under the action of gravity forces, the screwrotating continuously to free the place for the next tube.

What we claim is:

l. A device for tube transfer in a tube-rolling mill from the rollertable to a continuously transporting mechanism, comprising a drum withlongitudinal grooves for tubes, said grooves being made on the outersurface thereof; guides disposed near the cylindrical surface of saiddrum and used to provide for the removal of the tubes in a certainorder; arcshaped slidable shields provided on said guides and embracingthe portion of the drum cylindrical surface disposed below the axis ofthe drum rotation.

1. A device for tube transfer in a tube-rolling mill from the rollertable to a continuously transporting mechanism, comprising a drum withlongitudinal grooves for tubes, said grooves being made on the outersurface thereof; guides disposed near the cylindrical surface of saiddrum and used to provide for the removal of the tubes in a certainorder; arc-shaped slidable shields provided on said guides and embracingthe portion of the drum cylindrical surface disposed below the axis ofthe drum rotation.